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Figure 2 Kaplan-Meier curves showing cumulative incidence of reinfarction in patients assigned to heparin (bold lines) or hirudin. (Left) Event rates during study drug infusion until discontinuation. (Middle) Event rates after study drug therapy discontinuation until 12 h. (Right) Event rates in period starting 12 h after antithrombin therapy discontinuation. At beginning of each period, event rates were (re) set at 0%. Any patient still alive contributes to event estimates in each period.